package com.qf.day01;

import java.util.Scanner;

public class Ass {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("输入高");
        double tall = sc.nextDouble();
        System.out.println("输入底");
        double bom = sc.nextDouble();
        System.out.println("三角形面试是" + bom * tall / 2);
    }
}
